Solid tire



Aug. 12 1924. 1,504,449

AAAAAAAAA ES IIIIIII RE INVENTOR. a Afloefl Hurgvcves BY Patented An t, TE, 11924.,

narre starts paraat o ALBERT HARGRAVES, UIF EAKRON, OHTO, ASSTGNOR TO THE FIRESTONE TERE AND RUBJBER COMPANY, OF AKRON, onro a CORPORATIONOF OHIO.

` SOME TERE.

Application filed December 3, 19%. fierial No. ?19,833.

To aZZ whom it may concern:

Be it known that l, ALBERT Hancnevns, a citizen of the United States, residing at Akron, in the county or" Summit, State of a Ohio, have invented certain new and useful Tmprovements in Solid Tires, of which the following is a specification.

This invention relates to resilient or elastic tires adapted for use on vehiclesand pario ticularly on trucks or heavy commercial vehicles. The object of the invention is to improve upon the formation of the tread ot the tire so as to increase its tractive and nonskidding properties and to avoid objectionlt able noise in running :the tire over a smooth pavement. The present tire is provided with a central groove or depression which serves to ventilate the tire and with cross ribs over the rooVe which form pockets to prevent eo skidding, and constitute transverse formations which increase the traction or the tire and serve to brace the two parallel trea portions of the tire., ln the drawings there is shown an emboditt ment of my invention which illustrates one form which the tire may take it being understood that the showing and description is for the purpose of enabling one shilled in the art to practise the invention and is not to be W understood as limiting the invention to the form shown herein.

Tn the drawings:

Fig. l is a perspective view* of a section ot the improved solid tire. X

Figure 2 is a cross-section of the tire.

Figure 3 is a plan view thereof.

The tire comprises a solid band of rubber as l, which is secured to a metallic rim 2, by any suitable means, preferably by vulcaniza- :ro tion., The tire 'tapers gradually irorn the fianges oil the rim and in the central portion of the tread there is formed a relatively deep groove 3. This groove ertends within the body of the tire for a considerable depth and atords a means to ventilate and cool the center of the tire, thus providing two tread portions of similar height, indicated by the numeral l.

From each tread portion of the tire there is extended across the groove 3 to a point on the other tread portion inward ot the outer surface oi the tire, bridge pieces or transverse ribs, indicated by the numeral 5. These bridge pieces or ribs are arranged alternately or in staggered relation 'and are there is no tendency of the two portions to been described. The transverse ribs are pref spaced apart slightly as shown in the figures, particularly Fi 3, so that each tread portion is tied to t e other tread portion and a series of pockets 6 are formed between the two portions of the tire.

The combination of the transverse ribs and the pockets located between them create a firm positive grip or traction between the tire and the pavemcnt and as the pockets or recesses in the tire are vented above the tread, the objectionable pop-ping noise, due to the sudden release of the vacuum in a cup is avoided. As each tread portion is bound or tied together with the other tread portion separate or crack at the base ot the groove, The'pockets provide sufli cient suction to prevent slipping ot the tire on Wet pavements and the noise of the tire is eliminated as has arranged as shown in Figure 2, in that they are inclined the tire in opposite direction's, alternatel from points on each tread portion' of t e tire to points on the other tread ortion inWard of the tread surface. lin this manner the pockets are vented to avoid noise in running the tire and traction is increased at the tread.

'Changes and modifications may be made in .the exact torn of tire shown in the drawings without dep-arting from the scope ot the invention as set forth in the claims accompanying this application.

Claims:

l., A resilient tire comprising two tread portions separated by a circumferential, groove and transverse strengthening and tying ribs extending from the tread surface of one portion to points on the side of the other portion inward of its tread surface.

2. A resilien't tire oomprising two tread portions separated by a circurnferential groove and strengthening and tying ribs ern tending transversely of the groove, said ribs 100 being inclined.

3. Ar resilient tire'comprising two tread portions separated by a circumferential groove and strengthening and tying ribs extending transversely of the groove, said ribs 1 being inclined toward the base of the tire in opposite directions.

i. A resilient tire comprising two tread portions separated by a relatively deep circumferential groove, strengthening ribs eX- 1110 erably which it will be seen toward the center of tending from each tread portion 'to the other, said ribs being inclined 'toward the center of the tire in opposite directions alternately and extending from the tread surface of one portion to points inward of the 'tread surface on the other portion.

5. A resilient tire comprising two tread portions separated by a relatively deep, circumferential groove, strengthening rib extending from one tread portion to the other, said ribs being inclined toward the centerof the tire and being spaced apart circumferentially of the tire, whereby pockets are formed by the groove between the ribs.

6. A resilient tire comp-rising two tread portions separated by a relatively deep circumferential groove, strengthening ribs extending from each tread portion to the other,

said ribs being inclined toward the center of the tire in opposite directions alternately and extending from the tread surface of one of said portions to points inward of the tread surface on the other portion, said ribs being spaced apart circunferentially of the tire, whereby pocke'ts are 'formed by the groovebetween the ribs.

7. A resilient tire comprising two separate, circumferential, parallel tread portions, and strengthening and tying ribs extending from each tread portion to the other, said ribs being inelined 'toward the center of the tire in opposite directions alternatel and extending from the tread surface of each portion to points inward of the tread surface on the other ortion.

AL ERT HARGRAVES. 

